Cushion-tire and method of making the same.



1. L. SWARTZ. D METHOD OF CUSHION TIRE AN MAKING THE SAME.

APPLICATION FILED APR. 5. 19.

1 Patsnted Aug. 14, 1917.

' a'orm n. swen'rz, or Anson, euro,

CUSHION-TIRE AND METHOD OF- MAKING THE SAME.

Methods of Making the Same; and I do to be a full, clear, and

declare the following exact description 0 the invention, such as Will enable others skilled in the art to which it appertains to make and'use the same.

My lnvention relates to improvements in relnforced expansible cushion tires and the methods of making the same, the object being Q) provide a simple and comparatively inexpensive tire'having a reinforced base of hard rubber'faced with a metal rim engaging band, and to construct said band and ing in which:

' Figure 1 's a side elevation ofithe improved tire applied with parts in section;

Fig. 2 is a transverse section on the plane of the line 2-2-of Fig. 1; and,

Fig. '3 is a detail sectional perspective View of a portion'of the rim engaging band;

In constructing the improved tire, a continuous comparatively hard non-yielding rubber base 1 is formed on acontinuous rim engaging band 2, the latter having a plurality of oppositely inclining circumferential ribs 3 which are embedded in said base when the-latter is molded on the band.

A continuous comparatively soft and highly yieldable rubber tread 4 is applied to the base 1 and the two are cured together by vulcanizing or any other suitable process, the sides of said tread preferably having cavities 5 of suitable shape, the cavities on one side being staggered in respect to those on the other.

After the tire has-been constructed as described, either before or after the vulcaniz- Specification of Letters Patent. Patentgfi Aug, 14, 15M? mamas filed. April 5, 1917. Serial 1%. 159,928.

ing process, a number of transverse slits .6, are formed across and through the band 2 and the base 1, the slitting being preferably; done by a suitable'sawk The provision of the slits in-question permits the tire to be expanded for passage over. the side ring'of an automobile rim, the only resistance to this expanding being the yieldable tread 4 but the latter is of such character as to permit it to stretch the required amount.

After applying the tire to the rim, screws 7 are preferably passed outwardly through the felly and-rim'and threaded intothe' band, 2 and base 1 on opposite sides of-theslits 6. The improved tire will be highlyefiicient and durable, being efiiciently reinforced by the hard rubber base 1 and the metal band 2, whereas the tread 4 is highly yieldable and is rendered more so by the cavities 5.

Regardless of the eliieient character of the reinforcing means described, the formation of the transverse slits therethrough permits the tire to be easily attached to and detached from the rim even though the latter be permanently secured on thewheel and be provided with no detachable side rings.

I am aware that tires of the generalnature described have been heretofore used, but

in so far as I am advised, all of these tires;

are provided ontheir bases with cast metal tires are undoubtedly eflicient'when in use,-

but due to the several disconnected blocks,

blocks which contact with the rim. Thesev I they are much harder to construct than-the improved tire in which the band? and base 1 are formed as asingle piece and later slit transversely, v I claim':

1. A cushion tire comprisinga metal-rim engaging band, a'comparatively hard nonyielding rubber base surrounding said band and permanently joined thereto, and a comparatively soft and highly yieldable rubber tread surrounding and cured on said base, transvers circumfere'ntially spaced slits being formed through and entirely across said band and base to allow the tire to expand for application to a rim. I

2. The methodof making an expansible reinforced cushion tire consisting in mold ing a continuous comparatively hard nonmy hand in the presence of two subscribing yleldlng rubber base on a c'ontlnuous metal \vltnesses.

rim engaging band, curlng a comparatively r soft and hlghly yleldable rubber tread 011 JOHN SYVARJZ' 5 said base, and forming transverse slits Vitnesses:

through and across said band and said base. VVALTER J. I-I'ELMKAMP,

In testimony whereof I have hereunto set JACOB HEDDESHEIMER. 

